In some classification systems they have been called Plantae, by expanding the traditional plant kingdom (Embryophytes) to include the green algae.

Adl and colleagues, who produced a classification for eukaryotes in 2005, used the name Chloroplastida for this group, reflecting the group having primary chloroplasts with green chlorophyll. They rejected the name Viridiplantae on the grounds that most of the species are not plants, as understood traditionally.[6]